Determine the True Benefit from Process Variations

DETERMINE THE TRUE BENEFIT FROM PROCESS VARIATIONS 

Operating conditions may vary from time to time. Economic assessment estimated based on average values must be revised to take variations into account so that more 

Energy and Process Optimization for the Process Industries, First Edition. Frank (Xin X.) Zhu. 

The reason is that, use of average does not address the variation, which could significantly affect the economic evaluation of improvement. In reality, the letdown rate varies due to the fact that production rates change as well as weather changes and thus the MP requirement varies for MP users including the turbine to mn the K301 compressor. The first question is What is the variation of the HP letdown rate This question can be answered by measurement for the letdown valve shown in the distributed control system. 

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